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对７２例旅途精神病患者和９５例正常旅客所处车厢的理化环境作对照进行了调查研究，以探寻其对旅途精神病发生的影响，并就有关内容进行了相关分析。研究表明：患者所处车厢理化环境的二氧化碳含量显著高于对照组，气温则低于对照组，理化环境的二氧化碳及氧含量与一些生理指标有明显的相关。
The physical and chemical environments of 72 travelers with psychotic disorders and 95 normal passengers were investigated to investigate their impact on the psychosis of travel and to analyze the related content. The research shows that the content of carbon dioxide in physical and chemical environment of car cabin is significantly higher than that of control group, and the temperature is lower than that of control group. The physical and chemical environment of carbon dioxide and oxygen content have obvious correlation with some physiological indexes.